Science Quiz # 3

1. Which human body system directly interacts with the muscular system to produce voluntary movement?

• A. Respiratory System
  

• B. Nervous System
  

• C. Endocrine System

• D. Circulatory System

2. Which organ is primarily responsible for filtering blood in the excretory system?

• A. Liver
  

• 
  B. Bladder
  

• 
  C. Kidney
  

• D. Pancreas

3. Which structure protects the human brain?

• A. Ribs
  

• 
  B. Skull
  

• 
  C. Spine
  

• D. Pelvis

4. The primary function of the alveoli in the lungs is to:

• A. Filter airborne pathogens
  

• 
  B. Regulate body temperature
  

• 
  C. Exchange gases between air and blood
  

• D. Transport oxygen to the heart

5. Which system is mainly responsible for producing hormones?

• A. Nervous System
  

• 
  B. Endocrine System
  

• 
  C. Respiratory System
  

• D. Digestive System

6. The spinal cord is part of which human body system?

• A. Circulatory System
  

• B. Skeletal System
  

• C. Nervous System
  

• D. Muscular System

8. 7. Which component of the digestive system is primarily responsible for nutrient absorption?
   
   

• A. Stomach
  

• B. Large intestine
  

• C. Liver
  

• D. Small intestine

8. Which hormone regulates the body's metabolism?

• A. Insulin
  

• B. Estrogen
  

• C. Thyroxine
  

• D. Adrenaline

9. 9. Which animal system is directly involved in excreting nitrogenous waste like urea?
   
   

• 9. A. Digestive system
     

• 9. B. Respiratory system
     

• 9. C. Excretory system
     

• 9. D. Endocrine system

10. 10. Which part of the circulatory system is responsible for transporting oxygen-rich blood away from the heart?
    
    

• 10. A. Veins
      

• 10. B. Capillaries
      

• 10. C. Arteries
      

• 10. D. Lymph nodes